CVE-2026-45504

HIGH

Microsoft Exchange Server Elevation of Privilege Vulnerability

Title source: cna
STIX 2.1

Description

Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory patch
Microsoft Exchange Server Elevation of Privilege Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45504

Scores

CVSS v3 8.8
EPSS 0.0040
EPSS Percentile 31.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-918
Status published
Products (8)
microsoft/exchange_server 2016 cumulative_update_23
microsoft/exchange_server 2019 cumulative_update_14 (2 CPE variants)
microsoft/exchange_server < 15.02.2562.043
microsoft/exchange_server_subscription_edition < 15.02.2562.043
Microsoft/Microsoft Exchange Server 2016 Cumulative Update 23 15.01.0.0 - 15.01.2507.069
Microsoft/Microsoft Exchange Server 2019 Cumulative Update 14 15.02.0.0 - 15.02.1544.041
Microsoft/Microsoft Exchange Server 2019 Cumulative Update 15 15.02.0.0 - 15.02.1748.046
Microsoft/Microsoft Exchange Server Subscription Edition RTM 15.02.0.0 - 15.02.2562.043
Published Jun 09, 2026
Tracked Since Jun 09, 2026